The National Weather Service (NWS) 24 hour observed precipitation shows that there was 0.00 to 0.50 inches of rain in the Potomac basin above Little Falls. The NWS 3-day forecast predicts accumulations of 0.50 to 1.50 inches of rain over this same area. The US Geological Survey shows that Point of Rocks flow has been fluctuating around 2,000 cfs, our trigger for daily monitoring, since yesterday. The NWS Global Ensemble Forecast System simulations predict that flow at Point of Rocks will continue to rise above 2,000 cfs. We will continue daily monitoring efforts until we see that flows have significantly improved for several days.
Daily Flows:
Little Falls gage flow 2017-10-10: 1176 MGD (1820 cfs)
Little Falls gage flow 2017-10-11: 1396 MGD (est., based on recently available real time data) (2160 cfs)
Note: Gage flow at Little Falls is measured after water supply withdrawals.
Point of Rocks flow 2017-10-10: 1267 MGD (1960 cfs)
Point of Rocks flow 2017-10-11: 1383 MGD (est., based on recently available real time data) (2140 cfs)
Net Potomac withdrawal (2017-10-10):
FW Corbalis withdrawal (Potomac): 85 MGD
WSSC Potomac withdrawal: 127 MGD
Aqueduct withdrawal: 137 MGD
Total Potomac withdrawal: 349 MGD